If we are constantly being swept off our feet with frantic activity, we will be unable to be attentive at the moment of inward silence. A mind that is harassed and fragmented by external affairs is hardly prepared for meditation. The church Fathers often spoke of ... "holy leisure." It refers to a sense of balance in the life, an ability to be at peace through the activities of the day, an ability to rest and take time to enjoy beauty, an ability to pace ourselves. With our tendency to define people in terms of what they produce, we would do well to cultivate "holy leisure." And if we expect to succeed in the contemplative way, we must pursue "holy leisure" with a determination that is ruthless to our datebooks.

Richard Foster, Celebration of Discipline

From Spurgeon's entry for the morning of August 15 in Morning and Evening:

"Isaac went out to meditate in the field at the eventide" (Genesis 24:63).

Very admirable was his occupation. If those who spend so many hours in idle company, light reading, and useless pastimes, could learn wisdom, they would find more profitable society and more interesting engagements in meditation than in the vanities which now have such charms for them. We should all know more, live nearer to God, and grow in grace, if we were more alone. Meditation chews the cud and extracts the real nutriment from the mental food gathered elsewhere. When Jesus is the theme, meditation is sweet indeed. Isaac found Rebecca while engaged in private musings; many others have found their best beloved there.

For all the devotional masters the meditatio Scripturarum, the meditation upon Scripture, is the central reference point by which all other forms of meditation are kept in proper perspective. Whereas the study of Scripture centers on exegesis, the meditation of Scripture centers on internalizing and personalizing the passage. The written Word becomes a living word addressed to you. This is not a time for technical studies, or analysis, or even the gathering of material to share with others. Set aside all tendencies toward arrogance and with a humble heart receive the word addressed to you. Often I find kneeling especially appropriate for this particular time. Dietrich Bonhoeffer says, "... just as you do not analyze the words of someone you love, but accept them as they are said to you, accept the Word of Scripture and ponder it in your heart, as Mary did. That is all."

 Richard Foster, Celebration of Discipline

What happens in meditation is that we create the emotional and spiritual space which allows Christ to construct an inner sanctuary in the heart. The wonderful verse "I stand at the door and knock . . ."  was originally penned for believers, not unbelievers (Rev. 3:20). We who have turned our lives over to Christ need to know how very much he longs to eat with us, to commune with us. He desires a perpetual Eucharistic feast in the inner sanctuary of the heart. Mediation opens the door and, although we are engaging in specific meditation exercises at specific times, the aim is to bring this living reality into all of life. It is a portable sanctuary that is brought into all we are and do.

Inward fellowship of this kind transforms the inner personality. We cannot burn the eternal flame of the inner sanctuary and remain the same, for the Divine Fire will consume everything that is impure. Our ever-present Teacher will always be leading us into "righteousness and peace and joy in the Holy Spirit" (Rom. 14:17). Everything that is foreign to his way we will have to let go. No, not "have to" but "want to," for our desires and aspirations will be more and more conformed to his way. Increasingly, everything within us will swing like a needle to the polestar of the Spirit.

Richard Foster, The Celebration of Discipline