In plain words
Take refuge in Him in every way. By His grace you will reach peace. By His grace you will also reach that state which has no end. Bhārata, there is no other gain than this.
Word for word
O descendant of Bharata, take refuge in Him in every way. Through His grace you will attain peace; through His grace you will also attain that endless state. There is no other attainment beyond this.