When you want to drink tea, then no matter which variety that you decide to make, you will always need water, a pot, and heat. If you lack any one of these, there will be no tea.
Likewise, when you choose one of the many paths that lead to buddhahood, you will always need renunciation, bodhicitta and right view. If you lack any one of these, you will not become a buddha.
Why would you invest all that energy on those plans for the future if you were not somehow blindly convinced that you are still sure to be here in this world for a long time to come?
The great practitioners of the past described themselves as “yogis with the thought of impermanence implanted firmly in their hearts.” They saw clearly the futility of ordinary pursuits.
Their minds were entirely turned toward the Dharma.
Dilgo Khyentse Rinpoche
A bodhisattva is someone who has taken on the sole task of meeting the needs of others, no matter how difficult that might be.
His or her self-centeredness has been reduced to the point where wisdom, love, and compassion arise naturally, benefiting any situation. So the mind of a bodhisattva is heroic, vast, and of limitless benefit.
Chagdud Tulku Rinpoche