keep nothing back

She could keep nothing back from God; He must have all.

It isn't a thing that's generally known," he said softly, "and of course you realize I'm trusting a great deal to your discretion in talking so freely, but I feel so sure you're not going to let the chance slip, Bob, that I thought it was the best way to let you know the whole situation and keep nothing back at all.

She could keep nothing back from Eunice, even if she would; and in her heart she knew that her sister’s thought would be, that she had missed more than she had gained by her over-eagerness to succeed.

Tell Him your whole story, and keep nothing back.

Unbosom yourself freely to Him: keep nothing back.