But solid food is for the mature, who by constant use have trained themselves to distinguish good from evil. - Hebrews 5:14 http://www.biblegateway.com/passage/?search=Hebrews5:14&version=NIV
"Anyone can buy a nice outfit, register, get a number, show up at the starting line, cheer when the gun goes off, and maybe run a mile or two. But only those who have trained by putting in the months and miles will finish the marathon.
That's the point of Hebrews 5:14....
To go from A to Z in the spiritual life also takes a plan, a training schedule." -- from The Runner's Devotional by Dana Nieluchwski and Dave Veerman