A Mantra is an inspired and intuitive and rhythmic utterance, a revealed seeing, an expression of a deepest spiritual reality or truth. 3/1
The sound 'man' also refers to all the activities of the mind and ultimately the Mind itself. 3/5
मननात् त्रायते इति मन्त्रः. 3/6
The word मन्त्र refers to the power of silencing the mind.
The word ऋक् refers to the power of bringing illumination.
The word ब्रह्मन् refers to the power of expanding the consciousness
The word छन्दस् refers to the rhythmic utterance. 3/7
You may visit the following link to read a short write up on the the power of Mantra.
bhagavadgita.org.in/Blogs/5acc40e0…