The holy things referred to here are the offerings made by Israel to Jehovah, a part of which was presented to God in fire, and the rest partaken of by the priests and their families. None, however, might feed on them whilst ceremonially unclean. This suggests some useful precautious for ourselves, if we would fully enjoy the privileges and blessings attending the worship of the holy God.
We must be clean before we can enjoy the private reading of the Word of God. - We would wash our hands, soiled with the dust and grime of toil, before opening an exquisitely printed copy of the Scriptures; how much more should we seek cleansing at the hands of Christ before we feed on the holy things of Scripture!
We must be clean before entering the House of God. - It is a holy habit for each intended worshipper to be quiet before leaving the house on the Lord's day; or to use carefully the moment of the bent head at the commencement of the public service, in order that the soul may be made clean from any contracted stain, and resolve henceforth to abstain from all evil.
We must be clean before partaking of the Lord's Supper. - There we feed upon the bread of God; and as we wash our hands before we sit at the table of a friend, so should our hearts be cleansed ere we partake of the emblems of the body and blood of Christ. Holiness becomes God's house. Those that ascend the hill of the Lord must have clean hands and a pure heart. The reason why religious exercises do not profit you, may lie in your failure to comply with this demand. "He shall not eat of the holy things until he be clean."