To practice what you preach and to maintain your integrity you need to have strong convictions in your beliefs and ideas. And the conviction should stand strong even when confronted with the highest test, which is adversity. Only a strong conviction will give you the courage to stand for your beliefs and other issues. All great leaders and people who have blazed a trail through history had only their conviction as their greatest strength. If you want to know more on what strength that conviction can really provide, read the famous assurance quotations and sayings given below.