The verb "alter" means to make changes in size, style, shape, or kind. The noun "altar" means an area of worship, such as a platform, where people offer prayers or sacrifices to God.
'Alter' and 'Altar' are homonyms that sound exactly the same (and even look similar), but have slightly different spellings and different meanings. One of the key differences between alter and altar is that they are different parts of speech because alter is an action (verb) and altar is a thing (noun). But there is a more subtle reason people may blend the two words: they are both related to the process of transformation. When something or someone is altered (changed), it is often because they have voluntarily surrendered the old way of doing things. In a religious context, this capitulation often happens at an altar.
In Christianity, the ALTARed Life is the holy result of being saved by Jesus. By grace, through faith, we accept Jesus' invitation to save our lives from unalterable sinfulness. In turn, we receive power through the Holy Spirit in us to change as we "lose [our] life for [Jesus] and for the gospel" (Mark 8:35). This invitation has always come through the saving work of the cross, the altar, where we see Christ carrying the weight of our sins and being crucified on our behalf.
ALTARed Life Apparel & Christian T-Shirts exists to exhort those who believe in Jesus to return to the cross again and again. At the cross, we are forgiven of our sins through the blood of Jesus, and we are transformed by the power of the Holy Spirit living in us.