The mind, according to Earl Nightingale, "moves in the direction of our now dominant thought." However, you can change this - the human brain is similar to a computer, and you can change how it works as long as you know the correct language to input.
Practitioners of neuro-linguistic programming (NLP) work with clients to identify their preferred representational system (PRS) and 'reprogram' their ideas, opinions, and behaviours, allowing them to live happy and more fulfilling lives.
Online neuro-linguistic programming courses can help you get there, whether you want to assist others to cope with painful conditions like anxiety and PTSD or simply want to modify your view on life. There are approved online NLP training courses.