Resolve to master the senses through meditation and follow it steadily, systematically and regularly, at a stated time and place, without changing them as the whim takes you. Do not alter as fancy dictates for that will bring about dire consequences. For those who eat too much and get exhausted with the task of assimilating it, those who eat less and suffer from exhaustion, those who sleep too much or too little, those who indulge in spiritual practices according to 'convenience' (that is to say, who do it for long hours one day because they have no other work, but do token meditation the next day, because they have lots of engagements), those who give free rein to the six inner enemies, those who do not confer joy on parents, and those who have little faith in the Lord installed in their hearts – for all these people spiritual practices will yield no fruit at all (Geetha Vahini, Chap 11)