Before making assumptions about use of quoting Holy Scripture, keep in mind, God's ways are not man's ways. He tells us many different truths in a single word. Any person quoting the Word has his understanding and reasoning involved with the selection, not the reader's,, while in attempting to transmit his ideas from his understanding to others. It is not necessarily out of context. Perhaps one child of God understands a different level or meaning to a given quote.
If many quotes on the same vein of thought and meditation are included together it is usually held together by a coomen subject in the manner given to be understood. Look for the connecting thread, do not rely solely on the understanding you already have, though it is justified, for, again, there may be many meanings to the same quote.
One of the laws given is not to sow two kinds of seed in the same field........now think of the parable Jesus gave us of the Sower, the seed, the tares, etc. A very expanded meaning is given by our Lord. Do not assume about our family in Christ..