Thou knowest my downsitting ... - In the various circumstances of life, thou knowest me. Thou knowest me in one place as well as in another. I cannot so change my position that thou will not see me, and that thou wilt not be perfectly acquainted with all that I say, and all that I do. In every posture, in every movement, in every occupation, thou hast a full knowledge of me. I cannot go out of thy sight; I cannot put myself into such a position that thou wilt not see me.
Thou understandest my thought - Hebrew, “As to my thought.” That is, Thou seest what my plans are; what I design to do; “what I am thinking about.” A most solemn reflection! How unwilling would bad people be - would even good people be - to have those round about them know always “what they are thinking about.”
Afar off - Not when the “thought” is far off; but “thou,” being far off, seest us as clearly as if thou wert near. I cannot go to such a distance from thee that thou wilt not see perfectly all that I am thinking about.