Arie told Colton, 27, to trust his gut and follow his heart regardless of what people might say.
"I truly believe life rewards you when you follow your own path," Arie captioned the image.
"Not paved by others but paved by your belief in what's right for you. I know many of you have your own opinions but be kind and open to the choices and decisions of the individuals that put their hearts on display."
Arie also wished the charity founder and former pro athlete good luck, adding, "As @laureneburnham would say #lovewins."
Arie faced immense backlash following his own The Bachelor stint due to his decision to dump his fiancee Becca Kufrin about a month after filming the finale -- which aired in March 2018 -- for a shot at reconciling with Lauren, the woman he had dumped at the Final Rose Ceremony but claimed to truly be in love with.
Although it was an unpopular and highly-criticized decision, Arie claims to have made the right one.
After breaking Becca's heart during what was supposed to be a "happy couple visit" on national television, Arie begged Lauren to take him back, and she opted to give him a second chance.