Verse 53 - Meaning:
Q:What (kim) is the most difficult thing (dushkaram) for a man to do (naraanaam) ?
A:To keep the mind (yan-manaso) always (satatam) under control. (nigrahah)
Q:Who (ko) can be considered as a true Brahmachari (brahmacaryavaan syaat) ?
A:That one whose libido has been sublimated. (yasca-askhalti-ordhva-retaskah)