When I was a kid, I thought the song title, “He Looked Beyond My Fault and Saw My Need” written by Dottie Rambo in 1967, was “He Looked Beyond My Faults and Saw My Knees.” Employing the logic of a child, I wondered why God would look at knees. Was it because they were weak? I knew that weak kneed meant “afraid.” I later discovered that Dottie had written the song about God’s unconditional love in response to her brother Eddie’s belief that he was unlovable because of the wrong things he’d done. Dottie assured him that God saw his weakness but loved him anyway.
God’s unconditional love is apparent throughout the many “weak-kneed” moments of the people of Israel and Judah. God sent prophets like Isaiah with messages for His wayward people. In Isaiah 35, the prophet shares the hope of God’s restoration. The encouragement that would come as a result of embracing hope would “strengthen the feeble hands, steady the knees that give way” (v. 3). Through the encouragement they received, God’s people would in turn be able to encourage others. This is why Isaiah instructs in verse 4, “Say to those with fearful hearts, ‘Be strong, do not fear.’”
Feeling “weak-kneed”? Talk to your heavenly Father. He strengthens weak knees through the truth of His Word and the power of His presence. You’ll then be able to encourage others.
Source: Our Daily Breat
Your Watchmen on the Wall 
Dr. James Dobson’s Family Talk