Here’s a Zen kōan that’s all about the importance of seizing the moment. It’s said to be a parable told by the Buddha:
This is a very powerful story. Here’s this man, facing imminent and certain death---and death in a most unpleasant manner---and what does he do? He plucks and eats a strawberry. And how sweet that strawberry tasted!
One thing at least is certain — This Life flies;
One thing is certain and the rest is Lies;
The Flower that once has blown for ever dies.