One of the profound principles that Karmayogi has revealed to us is that each thing that occurs in life is indicated beforehand. And there are no exceptions. A powerful positive or negative outcome in the future is always indicated by a small or large event earlier on. Thus, if we are conscious of the predecessor (whether or not we perceive it as such), any great negative can be avoided later on. I.e. We can simply consecrate the small negative condition that comes to our attention, and the larger problem will not arise in future.
Also when our consciousness is centered more deeply within, we will perceive such small indicators as pregnant with potentiality, whereas living on the surface misses these subtle warnings.
And yet even if we fail to recognize and consecrate such predecessors when they arise and were then effected negatively affected, we can still practice "past consecrate" to overcome its continued influence in the present.
In the Trollope novel 'Lady Anna' a young woman on a date with her cousin seriously injures her leg while walking across pods of stones on a pond. It would turn out to be a predecessor and harbinger of this man's later complicity in trying to murder her and her beloved.
This dynamic also occurs and is discussed several times by the team in Garry Jacobs' novel 'The Book.'