Steadfast?

Kedum perukkamum illalla nenjatthu kodaamai saanrorkkani - Tirukkural Losses and gain come and go; to remain steadfast in principles is the hallmark of the wise - Loose Translation Of all the things that Tiru said, this one must rank very high as being totally impractical. I mean, come on, the chap really thinks that my own value systems should be unchanged regardless of what happens to me