TSK · Matthew 5:13

Every offering of your meal offering you shall season with salt; neither shall you allow the salt of the covenant of your God to be lacking from your meal offering. With all your offerings you shall offer salt.

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

For concerning those who were once enlightened and tasted of the heavenly gift, and were made partakers of the Holy Spirit,