If i ask you what is man's greatest need, what will be your answer ? Is your answer money ? education ? honor ? health ? family ? house ? food ? air ? water ? clothes ? friends ?
Yes we need those but are those the greatest ? what is our number one need ?
Have we observed man ? almost all men have the same needs. But can we trust men ? your answer most likely be no, is it not ? why ? the answer after we think of all the possibilities is " sin ". Sin reside in men that cause us to be selfish, etc. etc.
If we can get rid of sin in all of us, then problem solve. But one more thing we need love, true love.
But where did man came from ? God created man.
Where did sin came from ? from God's enemy the devil called Satan. Satan tempted , deceived Adam and Eve to take of the forbidden fruit,and then sin was passed on to man.
The Holy Bible or God's written word to man tells us that Jesus Christ is the only solution for sin.
So conclusion: Man's greatest need is Jesus Christ. From Him comes also the greatest love.
Perhaps you have questions, i recommend that you ask a true believer in Jesus Christ.