Alma 5:34 - Drink of the Bread & Waters of Life Freely

34 Yea, he saith: Come unto me and ye shall partake of the fruit of the tree of life; yea, ye shall eat and drink the bread and the waters of life freely.

2 Nephi 9 tells us that there is no price to partaking of Christ's Atonement (2 Ne 9:50-51).  His Atonement is a gift. Furthermore, it is incorruptible. It will not rust or lose its value over time, but rather is totally consistent. It works the same as it did yesterday and will continue to work the same tomorrow. The only thing he requires of us is that we accept the gift (come unto him) and obey his commandments.