John Trapp on Psalms 36:10

Verſ. 10. O continue thy loving kindneſſe] Heb. Draw it out at full length, extend and exerciſe it, lengthen and perpetuate it. Thus the godly greatly taken with the ſweetneſſe of Gods houſe, and rapt in the admiration of his tranſcendent goodneſs towards them, pray for a continuance thereof; Intimating alſo by the manner of expreſſion, that Gods peculiar mercies to his are a continued ſeries, there is a connection between them, yea a concatenation. And as in a chain, one link draweth on another, ſo doth one mercy another; unleſſe we break the chain by our unthankfullneſſe.

Ʋnto them that know thee — to the upright in heart] Here we have a juſt deſcription of the heirs of Gods promiſes, and of the partakers of his peculiar mercies. Firſt, They muſt be knowing perſons; know they muſt God and his will, themſelves and their duties. Secondly, They muſt be upright in heart; for knowledge without practice is like Rachel, beautifull, but barren; or like rain in the middle region, where it doth no good. A good underſtanding have all they that do his Precepts, Pſal. 111.10. and ſuch only are upright in heart.