There are “signs” that show a person is not apostate. Mormon’s teachings to his son recount the signs which show God is saving souls. These teachings are in Chapter 7 of Moroni’s book. The whole text is worth careful study.
Moroni records that God will let all mankind know with power and great glory at the last day that “the day of miracles” has never ceased. (Moroni 7: 35.) Nor have angels ceased to appear and teach those who are in need of instruction. (Moroni 7: 36.) Nor has the “power” of the Holy Ghost receded. (Id.) This is because these things are required for “one man upon the face [of the earth] to be saved.” (Id.)
When there is faith, there are miracles. (Moroni 7: 37.) When there is faith, then angels minister to the faithful. (Id.)
If the time comes when there are no more miracles and there are no more angels ministering to mankind, then it is because of “unbelief, and all is lost.” (Id.)
Moroni explains in simplicity and clarity: “For no man can be saved, according to the words of Christ, save they shall have faith in his name; wherefore, if these things have ceased, then has faith ceased also; and awful is the state of man, for they are as though there had been no redemption made.” (Moroni 7: 38.)
The priestly tradition mentioned here can provide the rites, teach the doctrine and preserve the truth, but the underlying reality must be pursued for salvation. Moroni explains how we must push beyond the mere symbol to the reality.
Rites may teach us about conversing with the Lord through the veil. However, when the rite is over it leaves you with only the idea, the outline, the admonition of how the Gospel operates. Then it is up to you to pursue the practice of the rites by your life, your faithfulness, and calling upon God to know Him.
Signs do not produce faith and never have. Signs do, always, and will forever, follow faith. (D&C 63: 9.) Moroni taught sound doctrine.
For each of us, the priestly tradition is never enough. Ancient Israel had their rites, observances, feasts and rituals. They could acquire ceremonial cleanliness by following the rules for purification. But, as the Lord observed, outward cleanliness can belie the inward filth if they failed to connect with God. (Matt. 23: 25-28.) It is always easier to be ritually clean and religiously pure than it is to be approved of God. It is much easier to rise inside an organization than it is to part the veil.
However, for those who seek God, no amount of praise in this world can tempt them to ignore the path of faith where they encounter the Holy Ghost, angels, the Lord, and the Father. (John 14: 23; D&C 130: 3.)