This is a simple fact of existence and one which we struggle against and resist.
We resist it because it means we can only ever stand on shifting sand and nothing can be taken for granted, and this is a painful and demanding truth to live with.
In order to live with it we create habits of mind and habits of action and create social structures which provide reassurance and safety.
The downside of these habits is that we can easily trap ourselves in empty routine, and rob life of its magic and excitement.
This is certainly true of relationships where we can substitute the real pleasure of constant discovery and communication with someone for the dull ritual of the known and tried. We can easily slip into habitually negative ways of relating to people which are unproductive. We can habitually not take action to correct difficult relationship issues. We can decide that our relationship with Ms, Mr. or Dr. X is thus and therefore impossible to change or modify.
Often poor relationships are powered by unresolved issues, and deep-seated or historical difficulties will need to be uncovered and repaired before improvement can take place.
The important factor in common in all such scenarios is our own willingness to change, to embrace the idea that change is desirable and to understand that the only person we can change is ourselves.
One of the most important requirements for change within an organisation is the culture of that organisation. This can be difficult to achieve but is possible providing your team is resilient enough.