Possible Clues:

• Willingness to say 'amen' to this skill
• Quality of being capable of doing something
• Competence that's unchanged with cap on
• Strength
• Talent, a little, one learner’s shown inside over year
• Competence unchanged by putting cap on it
• Thing you can do
• Hubbard analysed human kind
• Skill I kindled in a boy, nothing less
• Basis of a meritocracy