Grace is manna from heaven .. free and unmerited gift of God .. we are to go out (seek it), gather it, and eat it (receive it) ere it corrupt or be taken away by the "evil one." It is the "incorruptible seed" … the Word of God," the very Spirit of God, "that lives and abides forever." (1Pet 1:23). It is the "daily bread" of our spiritual life.
And it is the "mustard seed" that, when received, grows into a giant tree that reproduces many times its same seed.
Grace is the wisdom of God that, if partaken of, leads to salvation and blessing. It is the incorruptible manna that is in the vessel of gold (= salvation) in the innermost part of our tabernacle .. our Holy of holies — our soul .. inside the ark of the (new) covenant .. underneath the mercy seat of God's Spirit in those of us who are saved.
Grace CAN BE resisted and rejected as "light" — void of any substance — hated in comparison to the "foods" of this world. Grace is not the salvation or the blessingitself but the cause of them if we partake of it. Most assuredly it is Christ come down from heaven to be sought each day, gathered and partaken of .. His body (bread) broken for us.
Grace is only edifying to those that partake of it. It is the Holy Spirit in the form of the gospel of salvation and of the Bible unto sanctification and blessings.