Folau, a devout Christian, had his contract terminated by RA and the Waratahs for a "high-level breach" after he posted "hell awaits drunks, homosexuals, adulterers, liars, fornicators, thieves, atheists and idolaters" on Instagram.
RA and Folau failed to reach a settlement in June over the full-back's sacking and an unfair dismissal case began in court on Tuesday.
Solicitor George Haros, representing Folau, said his client is "extremely strong" and is keen for an apology as he addressed the media outside court.