This mantra to Vishnu helps us to come to a better understanding of ourselves, others, situations, motivations, allowing us see things clearly, rather than second guessing everything.
<img src="https://images.squarespace-cdn.com/content/v1/5d8aa184239fd0080c6e8bda/1628501194439-ZNLUT5335UQ7J4KPFV92/understanding.png" alt="understanding.png" />
It's a Gayatri mantra - most of the main Hindu deities have a Gayatri mantra, which is like a "signature" mantra and it has a lovely melody to it.
Om Shri Vishnave Cha Vidmahe
Tanno Vishnuh Prachodayat
Ohm shree vish-nah-vay chah vid-ma-hee
tann-oh vish-nuh pra-cho-dye-at-ay
Om, let me meditate on Lord Vishnu,
Oh Lord Vasudeva, give me higher intellect
And Lord Vishnu, illuminate my mind.