This can never be looked for in this life. The causes of doctrinal variation will therefore be apparent. If men came to the study of Biblical Theology with minds entirely unprejudiced, capable of examining its truths with the same mental powers, and with the same amount of study, all would agree as to its facts and doctrines. But this cannot be done. Mental capacities vary.
All men have their prejudices.
All have not equal time for study, and all use not equally the time that they have. Thus variety is certain even in studying Biblical Theology. With reverence for truth, and especially for the truth taught in the Word of God. With earnest prayer for Divine help. With careful searching of heart against prejudice.