The foremost activity everyone should engage in is to serve fellow human beings. Instead, people are wasting precious time worrying about either the past or the future. Embodiments of love! This body is not meant to be engaged in mere eating and drinking, and thus wasting away our valuable time. We must realise the truth that God has given us this body for serving others. All great men have sanctified their lives only by serving humanity. Every limb in the human body has been granted by God for Karmopasana (worshipping God through service). Karmopasana is the only means by which the human life can be sanctified. We are undertaking various sadhanas (spiritual efforts). But, all these can give us only temporary satisfaction, not eternal joy. Our ancient sages have been able to achieve eternal joy through conscious effort. Therefore you must develop firm faith in the truth that nothing provides eternal joy, except service to humanity.