The phrase "strong intellect" refers to having a powerful and sharp mind. It means being smart, knowledgeable, and quick at understanding and solving problems.
Sentences with «strong intellect»
Lee's arrogance was partly rooted in his strong intellect and his prodigious ability to look beyond the horizon. (fortune.com)
Strong voice / strong intellect... and bowls 200 +! (learnbonds.com)
For if only mind and will truly count, and the body is a mere object, then those who have strong intellects and wills can have no compunction about manipulating and even killing less intelligent or less «productive» humans for the greater good. (firstthings.com)