I. Look, first, at the words "Be strong" that is, for service. None can tell how strong for service they may ultimately become. All the strong men and all the great men become so by degrees. We find in the context four secrets of strength for service. (1) If you are to be strong in service, there must be a clear conviction that you are called of God to the work. (2) Along with a conviction of our call to the work, there must be an intimate knowledge of God. (3) A third element of strength is sincerity of purpose and willinghood. (4) Lastly, we must remember the Divine presence and fidelity. When we are strong in this remembrance, we can triumph and say, "If all men should leave us, yet we are strong, for Thou, Lord, wilt not fail nor forsake us."
II. Notice, next, the command "Do it." Having strengthened thy heart by the remembrance of these things, do it, not only intend to.We are to do whatever God has called us to do. That which is the work of one is not the work of another. Let our ears be open to hear what the Lord says, and then let us be strong and do it.
A. G. Brown, Penny Pulpit,No. 1061.
Reference: 1 Chronicles 28:20. Parker, vol. i., p. 44.