"Thus all whose hearts are full of love succeed in whatever they do."
-Jtk 533 Cullahamsa Jātaka
' Yes ! The practice of love is productive of all virtuous conditions
of mind both in good (beings) and in evil ones.
To all beings whatsoever,
who are in the bonds of conscious existence
is this practice of love of great advantage,
and therefore ought it to be sedulously cultivated.
-Milindapanha p.200 Mettā
Some people, at first, gain confidence when science is involved.
These references are not perfectly in line with the Buddha's Teaching
but can help gaining faith and understanding in the power of Loving-Kindness.
Loving-Kindness meditation was not invented by the Buddha,
but he highly praised its practice and development as a means for liberation and happiness.
Taking Mettā... Further. (25 min.)