Possible Clues:

• Antiperspirant brand once advertised as 'strong enough for a man'
• Antiperspirant brand once advertised as "strong enough for a man"
• Known by only a few
• Nobody will know if we keep it
• Whispered thing
• Don't show the way to keep it like this
• Spiritual teaching in religious group is not revealed
• Clandestine faction assimilates scripture
• Religious faction holds divinity to be known only to initiates
• It may be of untold value