Charles H. Spurgeon on Psalms 141:2

Set forth before thee as incense, whose fragrant smoke still ascends upwards. But many times in the very ascent, whilst it strives up higher and higher, infimo phantasmate verberatur, saith Gregory, "it is beaten back again by earthly imaginations which intervene", and then is extenuated by degrees, and vanisheth to nothing. Therefore the prophet prays ut diriyatur oratio, "that his prayer may be set before God", ut stubiliatur;so some render it out of the Hebrew, "that it may be established", that it may neither evaporate itself nor be whiffed about with the wind of vain and contrary imaginations, which come ab extrinseco from without], and may corrupt it. —Anthony Farindon.