I have not hid Thy righteousness within my heart; I have declared Thy faithfulness and Thy salvation: I have not concealed Thy lovingkindness and Thy truth from the great congregation. – Psalm 40:10 (Jesus speaking, by the Spirit of prophecy)

On the hill-top, where Jesus’ disciples came unto Him and He began with His benediction of “Blessed,” the multitude that gathered together, when He sat down and taught them, was doubtless imposing…With a great assembly He was at home; for His sympathy was mighty in its aggregate and minute in its detail. At the same time, Christ did not want a great congregation to enable Him to preach. The first verse of our text, if I catch the heart of its meaning, seems to me to intimate that He could speak personally to one or to two: “Lo, I have not refrained My lips, O Lord, Thou knowest.” From the court of human conscience to the court of divine omniscience the appeal is carried. Fame hath not heard of this private fidelity. Howbeit He that dwelleth in the heavens takes cognisance of it. “O Lord, Thou knowest, and canst bear witness to it. When there was but one woman at the well’s brink, I refrained not My lips.” When there were but two-His disciples, as He was going to Emmaus-He opened His mouth. Whether they were those whom He had made or would make His disciples, He had a word for all at all times and at all seasons. In this we ought to imitate the Master. Be ready to tell of Christ not only when your heart is prepared for it at a set time, but at all times, whether you have prepared for it or not. Your spirit should be always on the alert; you should always be on the watch for souls…O for a heart that is set on winning souls, that is set on glorifying God, that is set on coming nearer to the model and being more conformed in this matter unto Christ our Head! ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0977.cfm