But it is good for me to draw near to God: I have put my trust in the Lord GOD, that I may declare all Thy works. – Psalm 73:28

No man can give out what he has not received. If you are to be a fountain of living waters to others, you must be filled yourself from the fullness of God. Dear brethren and sisters, you whom the Lord has chosen to be vessels of mercy to others, take care that you wait much upon Him yourselves, and are much with Him in secret retirement. Live near to God, that you may bring others near. I remember sitting, one rainy day, in an inn, at Cologne, looking out of a window upon a square…I saw a man coming to a pump that stood in the middle of the square, and from that pump he filled a vessel A little while after, I saw the same man again filling his buckets. All that morning I saw no one else, but only that one water-loving individual man, filling his buckets again and again. I thought to myself, “What can he be? Why is he always drawing water?” Then I perceived that he was a water-carrier, a bearer of water to families in the adjoining streets. Well might he often come to the fountain himself, since he was supplying others. You that are water-carriers for thirsty souls must needs come often to the living water yourselves and be thankful that your Master is always willing to meet you and give you rich supplies. He graciously waits to take you apart in the way and speak to you things which you need to hear and tell. Take care that you hear well that which you are commissioned to publish to all the world. Take good note of this, ye who instruct others: neglect not the yielding of your ear to your Lord quite as completely as your tongue. Hear Him that you may speak of Him. Be ye sure that ye are much with your Lord alone, that you may have Him much with you in public. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2212.cfm