Gayatri Sadhana is never harmful

There are specific rules and procedures for Mantra Sadhana in general by which Anusthans, Puruscharans are performed. Ordinarily, any Anusthan performed in violation of the prescribed procedure may result in harm instead of doing well.
There are innumerable instances wherein the Sadhak had to suffer on account of certain omissions in the Sadhana. People have sometimes become insane. There are also instances narrated in the scriptures and history about people suffering from illness, death or loss of property due to such aberrations. As the story goes, Vrattra and Indra had to suffer great calamity on account of wrong pronunciation of VedMantras.
It is appropriate that like other Veda-mantra, Gayatri Mantra should also be pronounced correctly in a rhythm and its Sadhana should be performed in the prescribed manner, so that it may bestow the desired results. Yet, there is one specialty in vedmata Gayatri that an aberration in Gayatri Sadhana done through ignorance does not cause harm. Just as a compassionate, generous, wise mother always think of her child's welfare, so also Gayatri always promotes the wellbeing of the Sadhak. Children often commit mistakes and behave disrespectfully and rudely towards their mother. Even then, the mother does not entertain any malice nor does she harm them. When worldly mothers are so kind and forgiving, far more so is vedmata-Gayatri who is Mother of the entire Universe and is divine Ganga of righteousness. She is moved by faith and devotion of her devotees. Sadhak's aberrations in performance of rituals of Sadhana due to ignorance are washed away in the divine stream of Mother's love and affection
Lord Krishna has assured in the Gita that no good action ever reacts adversely. A work done, bona-fide, with good intention is bound to have good results, Righteous action, howsoever small it may be, safe guards a person against perils, fears and apprehensions.
Once Gayatri Sadhana has been started, the mind is slowly and steadily attracted towards it and if, for some reason, it is given up by the Sadhak, a keen desire to resume Sadhana again repeatedly surges up in his mind. After tasting some delicious dish once, a person desires to savor it again and again. In the same way spiritual food is as sweet as nectar and is so tasteful that the soul insists in, craves for and cries repeatedly to get it. It never results in any distress, calamity or hardship. It may be that due to certain omissions or mistakes one may no get the expected benefits but there is not the least doubt that even little of Sadhana does not go in vain.