"Only be thou strong and very courageous, that thou mayest observe to do according to all the law, which Moses my servant commanded thee: turn not from it to the right hand or to the left. 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 & 2 (Audio)
The following sermons are on Joshua 1:7 & 8:
Making Progress Through the Word, Part 1, by Rev. Colin Mercer
Making Progress Through the Word, Part 2, by Rev. Colin Mercer
Successful Christian Living, by Dr. Alan Cairns