God commanded Joshua to meditate: “This book of the law shall not depart out of thy mouth; but thou shalt meditate therein day and night, that thou mayest observe to do according to all that is written therein: for then thou shalt make thy way prosperous, and then thou shalt have good success.” 
                                                                                                                                                  Joshua 1:8 KJV

Why did God command Joshua to meditate? There are several reasons; first of all God wanted Joshua to have a more imitate relationship with Him. Which would be provided by the absorbing the scriptures. Secondly, because God knew in order for Joshua to prosper and be successful in his assignment. He needed meditation to provide him with spiritual strength. God knew that there would be unparalleled power,(supernatural) wisdom, other physiological and mental benefits in meditation. These benefits will show you why God is commanding you as a Christian to practice “Christian Meditation” listed below are the benefits:

Physiological benefits:
 Higher levels of DHEAS (Dehydroepiandrosterone)
 Prevented, slowed or controlled pain of chronic diseases.
 Makes you sweat less
 Cure headaches & migraines
 Greater Orderliness of Brain Functioning
 Reduced Need for Medical Care
 Less energy wasted
 More inclined to sports, activities
 Significant relief from asthma
 Improved performance in athletic events
 Normalizes to your ideal weight
 Harmonizes our endocrine system
 Relaxes our nervous system
 Produce lasting beneficial changes in brain electrical actively.
 Cure infertility (the stresses of infertility can interfere with the release of hormones that regulate ovulation).         

 Psychological benefits:                                                                                                                                                 Builds self-confidence.
 Increases serotonin level, influences mood and behavior.
 Resolve phobias & fears
 Helps control own thoughts
 Helps with focus & concentration Increased job satisfaction
Increase in the capacity for intimate contact with loved ones
Decrease in potential mental illness
Better, more sociable behavior
Less aggressiveness
Helps in quitting smoking, alcohol addiction
Reduces need and dependency on drugs, pills & pharmaceuticals
Need less sleep to recover from sleep deprivation
Require less time to fall asleep, helps cure insomnia
Reduces road rage
Increases sense of responsibility
Increases sense of accountability
Reduces road rage
Decrease in restless thinking
Decreased tendency to worry
Increases listening skills and empathy
Helps make more accurate judgments
Greater tolerance
Gives composure to act in considered & constructive ways
Grows a stable, more balanced personality
Develops emotional maturity

Spiritual benefits:
Helps keep things in perspective
Provides peace of mind, happiness
Helps you discover your purpose
Increased self-actualization                                                                                                                                                  Increased compassion
Growing wisdom
Deeper understanding of yourself and others
Brings body, mind, spirit in harmony
Deeper Level of spiritual relaxation
Increased acceptance of oneself
Helps learn forgiveness
Changes attitude toward life
Creates a deeper relationship with your God
Attain enlightenment
Greater inner-directness
Helps living in the present moment                                                                                                                                        Creates a widening, deepening capacity for love
Discovery of the power and consciousness beyond the ego
Experience an inner sense of “Assurance or Knowingness”
Experience a sense of “Oneness”
Increases the synchronicity in your life