"Not a word failed of any good thing which the LORD had spoken to the house of Israel. All came to pass."
God's Word's track record is 100%. When the Lord makes a promise to His people, He keeps it. In Jesus, the church has the complete fulfillment of the ultimate promise of God, (see 2 Cor. 1:20). Everything that we supremely need and want is to be found in Him (alone). Just as God delivered the Israelites into the promised land, and gave it to them--so He has translated His church from sin and death, and into Christ.
What do you need today? Go ahead and ask God for it. So long as you belong to the Savior, your Father is more than pleased to show you His faithfulness.
[Puritan quote of the day: "Shall man be proud after God has been humble?" --Richard Sibbes, in "The Bruised Reed"]