I am a stroooong believer in this sentiment and even though people can upset me to no end, I choose to not let that steer me away from being kind.
In the line of work I am, kindness is especially important.
Kindness should be what we all strive to achieve (do I make sense). It really costs very little to choose kindness.
Of course this does not mean that I am always kind but it is always the intention.
If I cannot be kind to you then I would rather keep away from you, that would be me being kind to you.
Through kindness I have been absolutely cared for and given so much support that I strive to provide the same for others. I am incredibly blessed.