Companion
Dutiya Sutta (SN 1:59)
“What is a person’s companion? What is it that instructs him? Taking delight in what does a mortal gain release from all suffering & stress?”
“Conviction is a person’s companion. Discernment is what instructs him. Taking delight in unbinding, a mortal gains release from all suffering & stress.”
See also: SN 1:36; AN 6:78; Dhp 31; Dhp 79; Dhp 88–89; Dhp 181; Dhp 187