Time

Each day, we all face a peculiar problem. We must validate our past, face our present, plan for the future.
Those whole believe that life was better in the "old days" sometimes are blind to the reality of the present; those who live only for the present frequently have little regard for either precedent or consequence; and those who live only for some deferred reward often strain themselves with too much denial. Thinking of past, present, and future is a useful conceptual technique, but ultimately they must be appropriately balanced and joined.
We must understand how the past affects us, we should keep the present full of rich and satisfying experiences, and we should devote some energy each day to building for the future. Just as a river can be said to have parts that cannot be clearly divided, so too should we consider the whole of our time when deciding how to spend our lives.

365 Tao
Daily Meditations
Deng Ming-Dao