I know whom i have believed

I know not why Gods wondrous grace
To me He hath made known,
Nor why, unworthy, Christ in love
Redeemed me for His own.
Refrain:
But I know Whom I have believed,
And am persuaded that He is able
To keep that which Ive committed
Unto Him against that day.
I know not how this saving faith
To me He did impart,
Nor how believing in His Word
Wrought peace within my heart.
I know not how the Spirit moves,
Convincing men of sin,
Revealing Jesus through the Word,
Creating faith in Him.
I know not when my Lord may come,
At night or noonday fair,
Nor if I walk the vale with Him,
Or meet Him in the air.