"My Heart and Lute", sometimes known by its first line, "I give thee all, I can no more", is a song/poem by Thomas Moore.
In Through the Looking-Glass by Lewis Carroll, Alice recognizes the tune used in the song called Ways and Means sung by the White Knight.
A lute whose gentle song reveals the soul of love full well; And, better far, a heart that feels Much more than lute could tell.
To keep life's clouds away, At least 'twill make them lighter pass Or gild them if they stay.
And ev'n if care, at moments, flings A discord o'er life's happy strain, Let love but gently touch the strings, 'Twill all be sweet again!