Leviticus teaches us that we need to “afflict ourselves” at times. At the feast day of atonement the instructions surround food offerings. Chapter 23, verse 27, says, “It shall be for you a time of holy convocation, and you shall afflict yourselves and present a food offering to the Lord.”
Parents must teach their children to control themselves at the dinner table (i.e., food offering). To afflict oneself involves self discipline. Ian Fraser talks about the laws at the “food offering” table.

He writes: Do not scream; for it is as if you scream all the time. If you are given a plate on which two foods you do not wish to touch each other are touching each other, your voice rises up even to the ceiling, while you point to the offense with the finger of your right hand; but I say to you, scream not, only remonstrate gently with the server, that the server may correct the fault. Likewise if you receive a portion of fish from which every piece of herbal seasoning has not been scraped off, and the herbal seasoning is loathsome to you, and steeped in vileness, again I say, refrain from screaming. Though the vileness overwhelm you, and cause you a faint unto death, make not that sound from within your throat, neither cover your face, nor press your fingers to your nose. For even now I have made the fish as it should be; behold, I eat of it myself, yet do not die.

As a fruit of the spirit “self control” should characterize every believer.