What does it mean?
The first sentence sounds like there are times when kindness isn't possible. The second says there never are: we can always choose to be kind.
Who said it?
Dalai Lama: Tibetan Buddhist spiritual leader, the 14th Dalai Lama (born 1935).
These exact words are widely credited to Dalai Lama, but they don’t appear in their known work. They may be a later paraphrase or a misattribution.