Knowledge or understanding of one's own nature, abilities, and limitations; insight into oneself.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "self-knowledge" in a sentence
"He was certain self-knowledge and not vanity guided him."
"He just found it hard to resist displaying the intelligent scrutiny he always brought to his endeavors and the self-knowledge that informed it, and which he believed he possessed in greater measure than most people did."
"But how you are to grow in self-knowledge, become more introspective, discover the authentic treasures of insight and of compassion and of spiritual discernment and of a deep bond to other solitary individuals, how in fact can like call out to like without reading, I do not know."