Source: Srimad Bhagavatham : Its Message for the Modern Man by Swami Shantananda Puri Maharaj
Srimad Bhagavatham (11:20:17)
नृ-देहम् आद्यं सु-लभं सु-दुर्लभं
प्लवं सु-कल्पं गुरु-कर्ण-धारम्
पुमान् भवाब्धिं न तरेत् स आत्म-हा
"All Sadhanas are possible only when we are endowed with a human body. This body of ours is the most efficient boat. Make the Guru the oarsman who will guide the boat and take it across the ocean. The Lord's Grace is the favourable wind in which the boat can sail swiftly and you can easily cross the ocean of Samsara (phenomenal world). Not to make use of the body in this manner is equivalent to committing suicide.''
Please check these: Excerpts from a discourse by our Sri Sri Muralidhara Swamiji
Bhagavãn has given you all the faculties. The Lord has blessed you with eyes, ears, mouth, hands, legs, etc. Should you not utter the Divine Name? Would you get the human birth again?
"Even the dog eats food. But can it chant 'Bhagavan Nãma' – the Name of the Lord? ('Nãyum kooda soru thinnum Nãmam pãdumo?')
Human birth is meant only for the purpose of attainment of Bhagavan
மனிதப்பிறவியும் முக்தியில் ஆசையும், மகான்களின் ஸஙகமும் உந்தீபற! அரிதினும் அரிதாமென்று உந்தீபற!
Three things which are rare indeed and are obtained only due to the grace of God
To have the opportunity to serve a Mahatma in some way is indeed the rarest of the rarest.
When Bhagavan decides a janma to be the very last one, the man attains a Sadguru. Don’t loose the “present” moment, the gift of lord.
कौमार आचरेत् प्राज्ञो धर्मान् भागवतान् इह । दुर्लभं मानुषं जन्म तद् अप्य् अध्रुवम् अर्थदम् ॥
Take the Name constantly. That is the best Seva.
But if I can make a person chant the name of Hari, I consider this a bigger achievement…………
To collect people living around one's home and help them chant the Lord's Name is verily service to the Guru. Or to follow the special instruction given to him/her by the Guru is verily 'service' to the Guru.
Serve the elders, poor and needy and people in misery. That is verily Guru Seva.
Chant the Mahamantra Nama kirtan :
Hare Rama Hare Rama Rama Rama Hare Hare
Hare Krishna Hare Krishna Krishna Krishna Hare Hare