There is a classic story on impermanence in The Words of My Perfect Teacher. A practitioner did a retreat in a cave for nine years. At the entrance of the cave, there were some nettles. His robes always got caught by the prickly plants every time he left the cave. As it was kind of a bother, he thought about cutting the nettles. Then the thought of possibly not being able to return to the cave again crossed his mind, he decided to do something more meaningful with his time instead. When going into the cave, his robes got caught as well. The thought of removing the nettles arose again. But considering the possibility that this might be his last time leaving the cave, he decided against it and saved the time for training the mind. He continued like this for nine years until he attained accomplishment in his practice while the nettles remained standing at the entrance. It was his firm conviction that all phenomena are impermanent that made him treasure every moment of his life by not spending it on something meaningless but practicing the Dharma. His accomplishment came as the result of realizing impermanence, not emptiness, of all phenomena.

- Quote from The Right View, "The Four Noble Truths—the Path Out of Samsara"

Let us use taking refuge in the Three Jewels as an example. No matter what the motivation is, taking refuge prevents obstacles caused by both human and non-human beings, purifies a great deal of negative karma and brings health and longevity. These are the benefits inherent in taking refuge.

We may often think to ourselves: I am not really willing to generate bodhicitta, as I am only interested in my own benefit. But I will force myself to do it. Because if I don’t, whatever I do will not be considered practicing Mahayana. This is called “contrived” bodhicitta.

Buddhism holds that a glass of water seen by sentient beings of the six realms will manifest six different phenomena, respectively. By the same token, beings of the six realms will see six different worlds, somewhat like the idea of the multiverse.

- Quote from The Right View, "Buddhism—the Definition"

There are two types of dedication: poisonous and nonpoisonous. “Poisonous dedication” means dedication with attachment. It is stated in the Prajnaparamita Sutra that good seeds sown with attachment is like poisonous food. It may taste delicious at first, but will cause tremendous pain when the poison takes effect. Similarly, good seeds sown not by actions performed with mind free of clinging, as explained above, may perhaps yield some transitory benefit, but more suffering will ensue and no liberation attained because such actions are deemed defiled phenomena.

Nonpoisonous dedication refers to dedication free of attachment and concepts, i.e. to dedicate while in the state of realization that the true nature of all phenomena is emptiness. Nonpoisonous dedication is further classified into two types—genuine and simulated. Genuine nonpoisonous dedication refers to the one made by the bodhisattvas, who have arrived at the first ground or higher, in a state of thought-free concentration. It is beyond the capability of ordinary people whose capacity is more suitable for simulated nonpoisonous dedication. This type of dedication is not to use the logic of Madhyamaka to discern the void nature of all phenomena but the visualization as described in the Thirty-five Buddhas Repentance Ritual . One should visualize in earnest as follows: “However the Buddhas and bodhisattvas of all times and ten directions dedicate their merit, I do the same with mine.” This way is simulated nonpoisonous dedication.

When ink is poured on the snow, the snow will be turned into ink color. After it melts, the color can still be seen on the ground. Similarly, if karma is born of defilements, the karmic mark will be left in the alaya consciousness after defilements are gone. Karma (or cause) is kind of a unique ability. Although our eyes cannot see how rice seeds germinate, they do have within themselves the capacity to do so. Likewise, when a karmic seed is planted in the alaya consciousness, it will yield fruit when all the right conditions come together. This fruit is also called karmic effect. And this particular capacity of the alaya consciousness to yield karmic fruit is the inherent nature of cause.

It is stated in the scriptures that ripening of the cause comes in four types. The first is the one that ripens in the same lifetime. For example, karma was committed in youth and the effect takes place in middle or old age. Sometimes karma ripens even sooner, and the effect can be seen immediately. The reason is that certain conditions can expedite the manifestation of fruit. Such fast ripening has something to do with the object and the motivation of the action. There are many such cases told in One Hundred Stories about Karma (Karmasakata). For example, the Sangha and ordinary people are two completely different objects. If it is a serious case of stealing from or slandering the Sangha, the retribution may come right away or in this lifetime. If the same act is committed against ordinary people, one will surely bear the consequence but not necessarily right away or in this lifetime. The different results arise from the difference between the two objects. The other condition is the difference in motivation. If the intention to kill is very strong or has been premeditated for a long time, the retribution will come swiftly, whereas the effect may not be immediately apparent if the motivation to kill is not so fierce.

The second is the effect of committing great evil, such as the five hellish deeds, or great virtue will definitely materialize in the next life.The third effect is certain to manifest but the timing of which is uncertain; it may take three or four lifetimes or even longer. The fourth, there may or may not be any effect. What could be the reason for this uncertainty in view of infallible karma? When a weak cause (or karma) encounters a strong antidote, causality may then be broken.

The first three types of karma, that is, the one that ripens in this and next life, and with uncertain timing, are immutable karma. The fourth, with indefinite fruition, is mutable karma.

The opposing view of impermanence is the view of the eternalists, which holds that all phenomena abide forever. The eternalist view is an inborn belief of ours. People tend to regard all appearances as permanent and thus develop either a sense of desire for or dislike of them. However, if one has acquired certain understanding of impermanence, one is unlikely to bear a grudge against others for long because enemies do not stay enemies forever. From a subtler perspective, enemies, like all phenomena, also intrinsically cease and arise every instant. If one were to look for some truly existing enemies, one would not find any in the end. The same goes with desire. People commonly believe that wealth and fame are something dependable and therefore pursue them with all their might. Would they still have been so enthusiastic about their pursuits had they known the impermanent and unreliable nature of all things in the material world?

- Quote from The Right View, "The Four Noble Truths—the Path Out of Samsara"

So, I hope you will all make generation of renunciation and bodhicitta your aim and strictly refrain yourselves from undertaking any Vajrayana practice until your aim has been achieved.