Differences in core values
While no two people can be absolutely alike, shared core family values and beliefs are integral to the success of a relationship. If your views on some of the most fundamental issues such as religion, politics, life goals are poles apart, it can lead to early relationship problems.
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Discuss these aspects before getting too emotionally invested in someone. If you don’t see eye-to-eye about most core values but still want to take the relationship forward, agree to disagree. And uphold that principle through the course of your relationship.