Martin Luther on Psalms 121:8

Verse. 8. The Lord shall preserue thy going out, and thy comming in, from hence forth and for euer.

That is to saye: whether so euer thou goest, the Lorde will be with thee, he will preserue thee, he will defende and keepe thee: he will neuer forsake thee nor suffer thee to perishe. To goe out, is to goe to the woorkes of thy vocation. To come in againe signifieth to returne from labour and trauell, to rest and quietnes. What so euer thou shalt goe aboute, shall haue good successe and prosper vnder thy hand. Thus the Prophet in this Psalme sheweth the nature of faith to be, not as it were a deade affection or qualitie of the minde, as the Papistes doe dreame, but a singular worke and motion of the holy Ghoste, whereby we iudge according to the worde, contrary to that which we feele, whiche we see, and by experience doe proue: whereby also we ouercome all kindes of tentations. Of this faith the Papistes can no better iudge then a blinde man can iudge of colours.