This generation needed to obey the laws of the Mosaic Covenant (v. 21) under which the nation already lived to experience the maximum benefits of this covenant. The maximum benefits included not only ownership of the land but also the use of it. The rebellious Israelite would suffer physical death (v. 20). Disobedience to the Mosaic Covenant (v. 25) would result in the Israelites being driven out of the Promised Land. In verse 29 the "secret things"refer to those things God knows but has not revealed (cf. Isa. 55:8-9). In the context this refers specifically to how Israel would respond to the covenant in the future. The "things revealed"refer to what God has revealed so that humankind may enjoy God's blessings. In the context this refers to the Mosaic Covenant.
