proveth: i.e. suffereth you to be proved. Hebrew idiom, which speaks of doing what one allows to be done.
your soul. yourself. Hebrew. nephesh. App-13.
Related Commentaries of Deuteronomy 13:3
Deuteronomy 13:3
3 Thou shalt not hearken unto the words of that prophet, or that dreamer of dreams: for the LORD your God proveth you, to know whether ye love the LORD your God with all your heart and with all your soul.