It's the same as we say, Do it now before it's too late or tomorrow never comes.

Procrastination is the thief of time.... We may never have the chance to do it tomorrow, so, why don't we go ahead and do it today

And yes, being grateful is one of the most important virtues of life no matter to who you show your gratitude! @dreemport

When we feel gratitude for all the things that we have and will have, life takes a different turn for us