Whatever you do for the realization of God cannot have any sinful effect. Self-control is absolutely necessary. All the hard disciplines enjoined upon Hindu widows are meant to help them practise self-control
There is a proverb: ‘the empty vessel sounds much.’ A person who is content within is a true yogi. That person who realizes the Truth does not speak about his attainment.
Sometimes you may meditate for a few days or for a few months, and then you think you know everything, or you are frustrated about your progress and you quit. To get real success, you must pursue your efforts continuously.