So encouraging to know the neither the problem nor the solution has changed in the last 350 years:
The reason our affections are so chilled and cold in religion—is that we do not warm them with thoughts of God. Hold a magnifying glass to the sun, and the glass burns that which is near to it. So when our thoughts are lifted up to Christ, the Sun of righteousness, our affections are set on fire. No sooner had the spouse been thinking upon her Savior’s beauty—but she fell into love-sickness. (Song of Sol. 5:8).
O saints, do but let your thoughts dwell upon the love of Christ, who passed by angels and thought of you; who was wounded that, out of his wounds, the balm of Gilead might come to heal you; who leaped into the sea of his Father’s wrath, to save you from drowning in the lake of fire! Think of this unparalleled love, which sets the angels wondering—and see if it will not affect your hearts and cause tears to flow forth! — Thomas Watson (The Great Gain of Godliness), p. 87