We must make an effort to "dress and keep" our relationship with God. Despite all that He does as aspects of His grace and favor toward us, in giving us whatever gifts we need to submit to and obey Him, we still have a function in this. We see here that one of the functions is to seek Him.
Here is a flat-out promise that if we do seek Him, He will be found of us. Keep in mind that this promise does not apply to just anyone. It does not happen just because a person thinks to seek God. This promise is made to those who have already made the covenant with Him. They have already been invited by God into it, which is the position Solomon was in. He had already made the covenant with God, as had David. We have to consider this as though David were speaking directly to us.
If we seek Him for the purpose of drawing near to Him, He will be found of us since He has already invited us to draw near to Him by calling us. This reveals a spiritual principle. These things always spring from God's initiative, for He is the Creator and Sovereign Ruler. We can thus take advantage of His invitation and come before Him at any time. It is, frankly, our responsibility.
John W. Ritenbaugh
The Holy Spirit and the Trinity (Part Seven)