O Lord. — Not in Samuel. Probably belongs to end of last verse.
For thy servant’s sake. — Comp. Psalms 132:10; 2 Chronicles 6:42. Samuel has the more original “for thy word’s sake.” (Comp. 1 Chronicles 17:23, and 1 Chronicles 16:15.)
Heart — i.e., purpose, intent.
In making known all these great things. (greatnesses). — The repetition “greatness... greatnesses” is probably a scribe’s error. Samuel has the right text: “Thou hast done all this greatness” (work of power, δύναμις), viz., informing Thy servant of what shall be hereafter. Isaiah makes the miracle of prediction a special difference between the true God and idols (Isaiah 41:21-29; Isaiah 45:11; Isaiah 45:21).