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

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