Complex sentence: Viktor Frankl openly spoke and wrote on religion and psychiatry, throughout his life, and specifically in his last book "Man's Search for Ultimate Meaning" (1997), he asserted that every person has a spiritual unconscious, independently of religious views or beliefs.
Split into simpler sentences: Viktor Frankl openly spoke and wrote on religion and psychiatry, throughout his life, and specifically in his last book "Man's Search for Ultimate Meaning" (1997). He asserted that every person has a spiritual unconscious, independently of religious views or beliefs.