Time- Quantity vs. Quality- Which is best?

I'm sure you've heard the saying  "it's not the quantity of time you spend with your children, it's the quality."
What this is implying is that we can invest 30 minutes of quality time with our children each evening (a fast-food mentality) and reap the same benefits as someone who faithfully invests a substantial amount of time in training and discipling our children. 
The truth is, there has to be both quantity and quality time spent with our children if we wish to influence our children and train them up for the Lord. Who our children spends the most time with are the ones who will influence them the most. We cannot expect 30 minutes of quality time with our children in the evenings to undo the influence of sitting 8 hours a day in the seat of  scoffers who mock God and His Word day after day.  Just as we wouldn't expect to reap a bountiful harvest of  fruits and vegetables from a garden that had little toil and labor involved.  If we want a harvest, we work hard at it, investing many hours watering, hoeing, and keeping watch for pests and diseases that would threaten our profit.  It takes even more time to water the hearts of our children with a steady flow of God's Word, love, and words of instruction. 

Be not deceived; God is not mocked: for whatever a man sows, that shall he also reap.
Galatians 6:7

Don't be fooled, training children takes time and lots of it!  Give your children the blessing of both quantity and quality time and expect to see the fruit of your labor of love. 

And these words which I command you today shall be in your heart. You shall teach them diligently to your children, and shall talk of them when you sit in your house, when you walk by the way, when you lie down, and when you rise up.  Deuteronomy 6:6-7