“We see that they could not enter in because of unbelief” (Hebrews 3:19). Only one sin kept Israel out of the Promised Land.
Canaan represents a place of rest, peace, fruitfulness, assurance, fullness, satisfaction, everything a true believer longs for. It is also a place where the Lord speaks clearly to His people, directing them, “This is the way, walk in it.” But Israel could not enter the Promised Land because of one sin.
That sin was not adultery (and Scripture calls these Israelites an adulterous generation). It wasn’t their rampant divorcing (Jesus said Moses granted divorces to that generation because they were so hardhearted). It wasn’t rage, jealousy, sloth or backbiting. It wasn’t even their secret idolatry.
The sin of unbelief prevented God’s people from entering Canaan. Therefore, Hebrews urges us today, “Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief” (Hebrews 4:11).
I have known many Christians who decided to get serious about their walk with the Lord. They determined to become more studious in His Word, and they fasted and prayed with renewed conviction. They set their hearts to cling to God through every situation in life, and as I observed their lives, I thought, “Surely all their devotion will bring a glow of joy. They can’t help but reflect God’s peace and rest.”
But all too often, the opposite was true. Many never did enter into God’s promised rest. They were still unsure, restless, questioning God’s leading, worried about their future. Why? They had a habitual leaven of unbelief and all their devotion and activity had been rendered ineffective because of it.
The believing servant clings to God’s New Covenant promise: “I will put my spirit within you, and cause you to walk in my statutes, and ye shall keep my judgments, and do them” (Ezekiel 36:27). He also clings to this Word: “I will cause him to draw near, and he shall approach unto me. . . . I will cause them to walk by the rivers of waters in a straight way, wherein they shall not stumble” (Jeremiah 30:21 and 31:9).