Srimad Bhagavatham 2:1:12
किं प्रमत्तस्य बहुभिः परोक्षैर् हायनैर् इह
वरं मुहूर्तं विदितं घटते श्रेयसे यतः
To a man who is negligent about his own interests, of what use in this world are long years of life that slip away unnoticed (are spent in ignorance) ?
Much more valuble is the hour, consiously spent, in endeavouring for the highest good.
Please check these: Excerpts from a discourse by our Sri Sri Muralidhara Swamiji