Spiritually, "beginning" happens when we first start new growth -- new levels of awareness and willingness to receive goods and truths from the Lord, and use them. In the Word, "beginning" doesn't just mean the beginning of something in time. In the inner sense, it means the initial phase of a spiritual state.

6174. 'Seventeen years' means the state there. This is clear from the meaning of 'seventeen' as from beginning to end, or from the beginning to something new, dealt with in 755, 4670 (end); and from the meaning of 'years' as states, dealt with in 487, 488, 493, 893, so that here 'seventeen years in which Jacob lived in Egypt' means the beginning of the state of spiritual life in the natural among known facts even to the end of that state. For all numbers in the Word serve to denote spiritual realities, see 575, 647, 648, 755, 817, 1963, 1988, 2075, 2252, 3252, 4264, 4495, 4670, 5265.