Follow peace with all men, and holiness, without which no man shall see the Lord – Hebrews 12:14

“Without holiness, no man shall see the Lord;” that is to say, no man can have communion with God in this life, and no man can have enjoyment with God in the life to come, without holiness. “Can two walk together except they be agreed?” If thou goest with Belial, dost thou think that Christ will go. with thee? Will Christ be a companion for thee? Dost thou expect to take the Lord of love and mercy with thee to the haunts of sin? Professor, dost thou think the just and holy One will stand at thy counter to be co-trader with thee in thy tricks? What thinkest thou, O man! wouldst thou make Christ a sharer of thy guilt? and yet He would be so if He had fellowship with thee in it. Nay, if thou wilt go on in acts of unrighteousness and unholiness, Christ parts company with thee, or, rather, thou never didst have any fellowship with Him. Thou hast gone out from us because thou wert not of us; for, if thou hadst been of us, doubtless thou wouldst have continued with us. And as to heaven, dost thou think to go there with thine unholiness? God smote an angel down from heaven for sin, and will He let man in with sin in His right hand? God would sooner extinguish heaven than see sin despoil it. It is enough for Him to bear with thine hypocrisies on earth; shall He have them flung in His own face in heaven? What, shall an unholy life utter its licentiousness in the golden streets? Shall there be sin in that higher and better paradise? No, no; God has sworn by His holiness-and He will not, He cannot lie, -that those who are not holy, whom His Spirit has not renewed, who have not been, by the regenerating power of the Holy Spirit, made to love that which is good, and hate that which is evil, shall never stand in the congregation of the righteous. Sinner, it is a settled matter with God that no man shall see Him without holiness. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2902.cfm