Failure to keep the balance breeds not only theological error but also moral and lifestyle problems of considerable severity. Overemphasis on the futuristic aspects of eschatology, e.g., at the expense of the realized aspects, may foster unhealthy speculation regarding what God has not revealed, date-setting as to when Christ will return, a denial of the graces and beneﬁts we have already received, and a depreciation of the importance of living together as Christians who constitute a kind of outpost of the new heaven and new earth. The opposite imbalance may prompt us to neglect the promises the Bible gives us regarding the future, to forget to live lives that look forward to and long for Christ’s return, and to act as if the fullness of all Christ provided by his cross-work is already our due.
D.A. Carson -- A Model of Christian Maturity, p. 52