It is impossible to develop contentment without gratitude - they are inseparable.

人没有感激之心是不能获得知足的——他们不可分离。

youdao

I know our family always will be grateful to have known him; from him we learned what it was to accept the bad without complaint and the good with gratitude to God.

我知道我们一家人永远都会以认识他而心存感恩。从他身上，我们学习到了该怎样面对逆境不心生怨愤，面对顺境，感怀上帝之恩。

youdao

Often we can go too long without showing our affection and gratitude, even to those who are closest to us.

我们常常不会轻易对我们身边的人流露感情，甚至是和我们最亲近的人。

youdao

Without a sincere sense of gratitude, sharing credit is just another manipulative trick bound to backfire.

FORBES: Giving Away Credit; Is It Worth It?

Those of us who were in Washington that day, without knowing it for sure at the time, now know we owe them an overwhelming special, personal debt of gratitude.

WHITEHOUSE: Vice President Biden Honors Flight 93 Memorial